Cannot add service node. The task fails with the error:
Failed to install RPMS to host '203.0.113.2', '/bin/env LANG=C /usr/bin/yum -y install pleskd':
Unsupported 3rd-party repositories are configured on service node. Yum tries to install nesessary package from there and fails.
Make sure the only repositories from the list below are configured on the service node:
CentOS-Base.repo CentOS-Debuginfo.repo CentOS-Media.repo CentOS-Vault.repo poa.repo
Disable or (re)move the others and run the task again.